MFT AR-15 Magazine 10-Round Limiter for .223 Rem/5.56/.300 BLK - Side Eject

If you're building or maintaining an AR-15 for restricted-capacity shooting—whether you're in a state with magazine limits or you're a competition shooter who needs a reliable 10-round option—the Mission First Tactical AR-15 Magazine 10-Round Limiter delivers the durability and handling you'd expect from MFT without compromise. This isn't a jury-rigged solution: it's a purpose-built 10-round magazine engineered from the ground up with a permanently sealed base and internal limiter, so there's no ambiguity about capacity. The design leverages MFT's second-generation long glass fiber polymer—25% stronger and 60% more impact-resistant than previous formulations—paired with a stainless-steel spring and a refined two-point follower system that ensure smooth, reliable feeding under real-world conditions.

The handling features matter in the field or on the range. A stippled texture and low-profile front ribs give you solid purchase when loading or unloading, while the flared floor plate plays nice with double and triple mag pouches, even when they're cinched tight. The oversized mag catch notch in the rear means more consistent bolt-catch operation—a small detail that adds up over hundreds of rounds. A drain hole keeps water and debris from pooling inside, critical for hunters and field shooters. Gray follower buttons signal the 20-round block internally, making it impossible to confuse this limiter with a standard magazine.

MFT built this magazine to run in .223 Rem, 5.56 NATO, and .300 BLK ARs, so if you're running any of those calibers, compatibility is straightforward. The side-eject design is standard AR-15 spec. At 4.8 ounces and 8.79 inches tall, it fits the footprint of a full-size STANAG magazine, so it'll feed from all standard AR lowers and pouches.

Key Features

• 10-round maximum capacity with permanently sealed base—no confusion, no workaround
• Second-generation long glass fiber polymer: 25% stronger, 60% higher impact resistance
• Stainless-steel spring and two-point follower system for reliable feeding
• Stippled texture and low-profile ribs for confident handling and extraction
• Flared floor plate designed for tight-fitting double and triple mag pouches
• Oversized mag catch notch for enhanced bolt-catch reliability
• Full drain hole prevents water and debris accumulation
• Gray follower button for easy visual identification
• Compatible with .223 Rem, 5.56 NATO, and .300 BLK AR-15 platforms

Specifications

Frequently Asked Questions

Will this 10-round magazine work in my AR-15?

Yes, if your AR-15 is chambered in .223 Rem, 5.56 NATO, or .300 BLK. The side-eject design is standard STANAG-compatible, so it will feed from any AR-15 lower receiver. The 8.79-inch height matches a full-size magazine footprint, so it works with standard mag wells and pouches.

Can the magazine be restored to 30-round capacity?

No. The base is permanently sealed and the internal limiter is fixed in place. This magazine is engineered as a 10-round magazine—it cannot be converted back to higher capacity.

What's the gray button on the follower?

The gray follower button indicates a 20-round block internally, part of the two-point follower system. It helps ensure smooth feeding and serves as a quick visual identifier that this is a limited-capacity magazine.

Will this magazine fit in tight magazine pouches?

Yes. The flared floor plate is specifically designed to work with double and triple mag pouches, even when they're snugly fitted. The low-profile front ribs also aid in extraction from tight carries.